measurements & dates

CCAM Type 1 will have a lesion measuring (1)_______ than (2)__ cm.

1. Greater

2. 2

CCAM Type II will have multiple lesions measuring approximately __ cm.

1.5

CCAM Type III will have multiple lesions measuring __-__ mm.

0.5 - 5

The most sensitive period for cardiac development in the 1st trimester is between __-__ weeks.

3.5 - 6.5

Circulation has begun at the end of week __.

3

Division of the 4 chambers occurs during weeks __-__ of fetal development.

4 - 5

The heart will begin to beat at week __.

5

The heart takes up what fraction of the chest?

1/3

What is the normal ratio for lung maturity using the Lecithin-Sphingomyelin ratio?

Greater than 2:1

The axis of the heart will be at a __ degree angle.

45

What fraction of babies born with ASD have secundum defects?

8/10

An azygous vein will be approximately what fraction the size of the SVC?

1/3

Orbital distance will increase from (1)__ mm at 12 weeks to (2)__ mm at term.

1. 13

2. 59

Orbital distance will increase from 13 mm at (1)__ weeks to 59 mm at (2)____.

1. 12

2. Term

What weeks can cleft lip/palate occur during?

6 - 10

Choroid plexus cysts will often disappear by __ weeks.

26

Acrania can be detected as early as __-__ weeks.

10 - 14

Anencephaly can be detected as early as __-__ weeks.

10 - 14

Diagnosis of agenesis and hypoplasia of the cerebellar vermis should not be made prior to week __

18

With cystic hygroma, any posterior neck thickness measuring (1)_______ than (2)__ mm, with or without septations, should be followed.

1. Greater

2. 3

What does a normal cisterna magna measure?

3 - 10 mm

An enlarged lateral ventricle will measure greater than __ mm.

10

An enlarged third ventricle affected by ventriculomegaly will be dilated greater than __ mm.

5

The first trimester include weeks__-__.

0 - 12

The second trimester include weeks__-__.

13 - 28

The third trimester include weeks__-__.

29 - 40

Anasarca is edema of fetal tissue. The skin will thicken to be (1)_______ than (2)___ mm.

1. Greater

2. 5

Pregnancy-induced HTN is diagnosed after ___ weeks of gestation.

20

Spalding’s sign can be seen ___ week after fetal demise.

1

Robert’s sign can be seen ___ week after fetal demise.

1

Type 2 diabetes makes up __-__% of all maternal diabetes cases.

90% - 95%

Type 1 diabetes makes up __-__% of all maternal diabetes cases.

5% - 10%

Vertebral defects of CRS present in __-__% of cases.

60% - 80%

Anal atresia of CRS present in __-__% of cases.

60% - 90%

Cardiac defects of CRS present in __-__% of cases.

40% - 80%

Trachea-esophageal fistula/atresia of CRS present in __-__% of cases.

50% - 80%

Renal anomalies of CRS present in __-__% of cases.

50% - 80%

Limb abnormalities of CRS present in __% of cases.

50%

About __-__% of women diagnosed with pre-eclampsia will develop HELLP syndrome.

4% - 12%

Nonimmune hydrops account for __% of hydrops.

90%

Fetal cardiac issues make up for __% of the cause of nonimmune hydrops.

40%

With doppler of the uterine artery, it is normal to see a diastolic notch until about ___ weeks.

26

When is it abnormal to see a diastolic notch or a high resistance waveform for the uterine arteries?

After 26 weeks

Pulsatility of the umbilical vein is normal to see up until ___ weeks.

20

An abnormal S/D ratio of the umbilical artery will be (1)________ than (2)___ after (3)___ weeks. It will also be demonstrated with a high resistance waveform.

1. Greater

2. 3

3. 30

1. Some evaluate the ductus venosus between weeks __-__ and __ days.

2. Others will in the __ and __ trimesters.

1. 11-13, 6

2. 2nd and 3rd

At __ weeks gestation, a triphasic waveform with positive atrial contraction will be seen for a doppler of the ductus venosus.

25

What is the ideal time for when to label which fetus twin A, twin B, or so on?

10 - 14 weeks

An appearing twin is when the gestational sac of the twin was not visualized at week __ or __ but seen later in pregnancy.

5 or 6

At what day will the formation of the chorion occur?

4

At what days will the formation of the yolk sac occur?

6 - 8

At what days will the formation of the amnion occur?

8 - 9

The zygote will divide between days __-__.

6 - 7

Monozygotic twins “Di-Di” occurs when one zygote divides during days __-__.

0 - 4

With monozygotic twins “Mo-Di,” the zygote will divide during days __-__.

4 - 8

With monozygotic twins “Mo-Mo,” the zygote will divide during days __-__.

8 - 12

Conjoined twins can occur if division occurs after __ days.

13

A uterine artery S/D ratio measuring (1)________ than (2)___ can be an indication for decreased maternal blood supply.

1. Greater

2. 2.6

Fill in the blanks:

1. The chorion will form at ___ days

2. The zygote will divide between __-__ days.

3. The yolk sac will form at __-__ days.

4. The amnion will form at __-__ days.

1. 4

2. 6 - 7

3. 6 - 8

4. 8 - 9

With monozygotic twins…

1. “Di-Di” zygote will divide during days __-__.

2. “Mo-Di” zygote will divide during days __-__.

3. “Mo-Mo” zygote will divide during days __-__.

1. 0 - 4

2. 4 - 8

3. 8 - 12